MaxxGel Teeth Whitening pen not only whitens your teeth, It also improves the health of your teeth and gums! Its now easier than ever to get a white healthy smile thanks to MaxxGel Teeth Whitening Pen. This Teeth Whitening Pen Has A Large Number Of Benefits: - Whitens teeth quickly and easily - Strengthens teeth against decay - Hardens enamel to reduce sensitivity - Kills bacteria to prevent infections. Doctors office formula is designed to work quickly to bring back the whiteness that you had in your youth.